Stop-cock.



R. W. BULL.

STOP COCK.

APPLICATION FILED MAR- 26. 1912.

1,156,269. Patnted 001. 12, 1915.

Rhino/mm warren snares Parana oriuoa.

ROBERT WILCOX BULL, 013 LOS ANGELES, CALIFORNIA, ASSIGNOR 0F ONE-HALF TO WILLIAM B. FRAZER, OF LOS ANGELES, CALIFORNIA, AND-ONE-TENTH T0 WILLIAM B. FRAZER, TRUSTEE, OF LOS ANGELES,

CALIFORNIA.

STOP-COCK.

Application filed March 26,

To all whom it may concern.

Be it known that I, ROBERT IVILGOX BULL, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented certain new and useful Improvements in Stop- Cocks, of which the following is a specification.

This invention relates to stop cocks, and more particularly to one. provided with a look, so that the passage of liquid therethrough cannot be obtained except upon the insertion of a key in the possession of an authorized person.

A further object of the invention is to provide a device of this character wherein the turning plug thereof is so formed that the same may be removed from the casing without the necessity of disturbing the locking mechanism.

With these and other objects in view, the invention consists in certain novel features of construction, combination and arrangement of parts as will be hereinafter fully described and claimed.

In the drawings: Figure 1 is a side elevation of the device. Fig. 2 is a vertical sectional view. Fig. 3 is a top plan view. Fig. 4 is a detail perspective view of the turning plug. 7

Referring to the drawing, the numeral 1 designates the body of the casing, having formed therethrough the central liquid passage 2, both ends of which open into the tubular exteriorly threaded extensions 3, and to which are secured the pipes for conveying and conducting the liquid to its point of use.

Intersecting the passage 2 is a turning plug 4 operable in the tapered bore 5 of the body 1. The turning plug 4: is shaped to correspond to the bore 5 and is provided with a transverse duct 6, said duct being adapted to register with the passage 2 when the device is operated to permit the liquid to flow. I

Extending upwardly from the body 1 is a sleeve 7 and in which is contained a locking mechanism, preferably of the well known Yale type. The upper end of the turning plug 4: is provided with a transverse groove 8, the same extending in the same direction as the duct 6.

A U-shaped member 9 is provided, and

Specification of Letters Patent.

Patented Oct. 12, 1915.

1912. Serial No. 686,448.

has its arms 10 connected at their upper ends to the lock mechanism, while the bight portion thereof detachably engages the groove 8 of the turning plug.

Depending from the body 1 is abarrel 11, the same being interiorly threaded for a certain distance of its length, and is adapted to receive the threaded plug 12. A coil spring 13 is provided, and has one of its ends resting upon the upper surface of the plug 12, while its other end bears against the lower surface of the turning plug 4, thus holding the plug in its proper position within the bore 5, and permitting the same to turn freely when a key is inserted, and the lock mechanism operated.

The device is particularly adapted for use in connection with the fuel tubes of motor vehicles, so that an unauthorized person could not confiscate the vehicle. It is obvious that the device may be used in any other connection wherein it is desired that a supply of fuel or liquid could not be obtained unless a person had a key for operating the device.

To limit the downward movement of the plug 4 when the key is inserted in the locking mechanism. a pin 14 is provided, and extends upwardly from the central portion of the plug 12.

What is claimed is:

1. A stop cock'comprising a body, a barrel depending from the body, a lock plug rotatably and yieldably mounted within the barrel, the said plug having a slot in the upper end thereof for engagement by a key whereby the plug may be rotated. and means for limiting the movement of the plug in the direction in which the key is inserted during the rotation of the plug.

2. A stop cock comprising a barrel portion, a lock plug rotatably mounted therein adapted to be rotated by a keyinserted in one end thereof. resilient means engaging the other end of the plug for normally holding the same in position and a stop pin within the barrel adjacent the said resilient means adapted to serve as a pivot in case the plug is pressed toward the same during its rotation by the key, the end of the pin and the adjacent face of the plug being normally in slight spaced relation.

3. A stop cock comprising a barrel, a lock plug rotatably mounted therein, resilient meansfor supporting the lock plug Within In testimony whereof I a'ffix my signature, the barrel, the SELlCl plug bemg construct-ed 1n the presence of two wltnesses.

and arranged to be en a 'ecl by a key and r rotated and means to orl trol the eompres- ROBERT WILCOR BULL sion of the resilient means during the rota- VVitnesses: tion of the plug and to act as a pivot for the LUCIEN EARLE, latter. E. L. HAMILL.

Gopies of this patent may be obtained for five cents each, by addressing the Commissioner of Eatents, Washington, D. C 

